Paper sheet stacking device

ABSTRACT

A conveyer belt is looped on rollers placed over and at both ends of a paper sheet storage part and bill holding members for holding bills are fixed onto an outer surface of the conveyer belt at determined interval. The bill holding members themselves have grip force by which the conveyer belt bends inward and the bills are held. When the bill holding members pass over the roller on a reception side, their free ends get apart from the conveyer belt and the bill holding members receive the bills. The bill holding members grip portions near ends of the bills when passing between rollers. When the bill holding members pass under the roller on a release side, their free ends get apart from the conveyer belt. The bill holding members release the bills, allowing the bills to fall onto stacked bills for staking storage.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation application of International Application PCT/JP2011/076786 filed on Nov. 21, 2011 which designated the U.S., the entire contents of which are incorporated herein by reference.

FIELD

The embodiments discussed herein are related to a paper sheet stacking device.

BACKGROUND

ATMs (Automatic Teller Machines), automatic transaction apparatus, and the like installed in stores and the like of financial institutions include paper sheet stacking devices which stack and store bills conveyed one by one. A bill is conveyed in a direction parallel with faces of bills stacked in a storage part, and its end slides on a top bill of bills stacked in the storage part. As a result, the bill is introduced into the storage part. Bills are stacked in this way in these paper sheet stacking devices.

Usually bills conveyed to a storage part have gone into various states different from their original states while they are in circulation. For example, a bill folded is creased. A bill put into a wallet is curled. A bill put into a trouser pocket is crumpled. If a bill in a state different from its original state, such as a bill in a curled state, is at the top of stacked bills, an end of a bill conveyed strikes against a rear end of the bill in a curled state and bills are not arranged properly. This interference between a bill conveyed and bills stacked is liable to occur especially in paper sheet stacking devices into which bills longitudinally conveyed are longitudinally introduced and stored.

Some proposals for avoiding the above interference between a bill conveyed and bills stacked are known. For example, portions near rear ends of bills stacked are pressed down by a hold-down lever to ensure a bill route in a direction from which bills are conveyed (see, for example, Japanese Laid-open Patent Publication No. 2010-95365). In this case, the hold-down lever is placed on an upstream side of a conveying roller which feeds bills into a storage part. One end of the hold-down lever is supported so that it will freely pivot. A free end of the hold-down lever touches a top bill of bills stacked in the storage part. As a result, a bill conveyed is inserted between the free end of the hold-down lever and the top bill, slides on the top bill while lifting the free end of the hold-down lever, and is stacked on the top bill.

Furthermore, a rear end of a bill which has just been introduced into a storage part is pushed downward by a runner to ensure a bill route in a direction from which bills are conveyed (see, for example, Japanese Laid-open Patent Publication No. 2003-16499). In this case, the runner is arranged coaxially with a conveying roller which feeds bills into the storage part. The runner pushes downward a rear end of a bill which has just been introduced into the storage part to prevent interference between the bill and an end of the following bill. Furthermore, even if a hold-down lever is also used, the runner can effectively prevent the flutter of a rear end of a bill which the hold-down lever cannot prevent.

However, even if a hold-down lever or a runner is used for pressing down or pushing downward a rear end of a bill introduced, there is a possibility that a portion on an end side of a bill to which the function of the hold-down lever or the runner does not extend is in a state different from its original state. In this case, interference may still occur between a top bill and the following bill.

SUMMARY

According to an aspect, there is provided a paper sheet stacking device which introduces paper sheets conveyed and which stores the paper sheets in a stacked state, the device including: a paper sheet storage part which receives and stores the paper sheets one by one; an endless conveyer belt looped on a first roller placed on a side over the paper sheet storage part on which the paper sheets are received and a second roller placed on a side over the paper sheet storage part on which the paper sheets are released; and paper sheet holding members each having one end fixed onto an outer surface of the conveyer belt and another end energized to a conveyer belt side on a downstream side in a conveyance direction of a position at which the one end is fixed.

The object and advantages of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the claims.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view which illustrates the appearance of an ATM to which a paper sheet stacking device according to an embodiment is applied;

FIG. 2 illustrates an example of the internal structure of a bill processing section of the ATM;

FIG. 3 is a side-view which illustrates the rough structure of a paper sheet stacking device according to a first embodiment;

FIG. 4 is a perspective view which illustrates the rough structure of the paper sheet stacking device according to the first embodiment;

FIGS. 5A and 5B are views for describing a relationship between a conveyer belt and a bill holding member of the paper sheet stacking device according to the first embodiment, FIG. 5A being a view for describing the shape of the bill holding member which is not yet attached to the conveyer belt, FIG. 5B being a view which illustrates a state of the bill holding member at operation time;

FIGS. 6A and 6B are views from a paper sheet storage part side which illustrate a state in which bill holding members are attached to the conveyer belt, FIG. 6A being a view which illustrates an example of the shape of bill holding members, FIG. 6B being a view which illustrates another example of the shape of bill holding members;

FIGS. 7A and 7B are views for describing another relationship between the conveyer belt and a bill holding member of the paper sheet stacking device according to the first embodiment, FIG. 7A being a view for describing the shape of the bill holding member which is not yet attached to the conveyer belt, FIG. 7B being a view which illustrates a state of the bill holding member at operation time;

FIG. 8 is a fragmentary sectional view which illustrates an example of the combination of the conveyer belt and the bill holding member;

FIG. 9 is a view for describing a state in which bills are arranged on a bill release side by the bill holding members;

FIGS. 10A and 10B are views which illustrate bill holding members included in a paper sheet stacking device according to a second embodiment, FIG. 10A being a view which illustrates the bill holding members that are arranged on a conveyer belt so as not to overlap with one another, FIG. 10B being a view which illustrates the bill holding members that are arranged on the conveyer belt so as to overlap with one another;

FIGS. 11A and 11B are views which illustrate a modification of the bill holding member included in the paper sheet stacking device according to the second embodiment, FIG. 11A being a view which illustrates bill holding members that are arranged on the conveyer belt so as not to overlap with one another, FIG. 11B being a view which illustrates the bill holding members that are arranged on the conveyer belt so as to overlap with one another; and

FIG. 12 is a view which illustrates a bill holding member included in a paper sheet stacking device according to a third embodiment.

DESCRIPTION OF EMBODIMENTS

Embodiments will now be described in detail with reference to the drawings with an ATM having a mechanism for conveying and storing bills longitudinally as an example.

FIG. 1 is a perspective view which illustrates the appearance of an ATM to which a paper sheet stacking device according to an embodiment is applied. FIG. 2 illustrates an example of the internal structure of a bill processing section of the ATM.

As illustrated in FIG. 1, an ATM includes in the front a customer operation part 1, a bill insertion and dispensing aperture 2, a coin insertion and dispensing aperture 3, a card insertion and ejection aperture 4, and a bankbook insertion and ejection aperture 5. The customer operation part 1 is used for operation by which input or instructions regarding a cash transaction are given. The customer operation part 1 includes a display portion, such as a liquid crystal panel, and a position input portion, such as a touch pad. Operation by which input is provided to the ATM is performed by touching a screen. The bill insertion and dispensing aperture 2 receives bills at the time of a transaction, such as receipt of money, and releases paid bills at the time of a transaction, such as payment of money. The coin insertion and dispensing aperture 3 receives coins at the time of a transaction, such as receipt of money, and releases coins paid as change at the time of a transaction, such as receipt of money or remittance. The card insertion and ejection aperture 4 handles a cash card used for identifying an individual at the time of the operation of the ATM, a transfer card used at the time of transfer operation, and the like. The bankbook insertion and ejection aperture 5 receives a bankbook and prints the contents of a transaction onto it.

As illustrated in FIG. 2, this ATM includes a bill processing parts. That is to say, the ATM includes the bill insertion and dispensing aperture 2 which receives and pays bills, a discrimination part 6 which determines the kind and genuineness of bills, and a temporary pool part 7 which pools received bills after determination, for example, until the conclusion of a transaction. In addition, the ATM includes a reject part 8 which stores, at the time of the determination that bills are inadequate for reuse being made, the bills as bad bills and storage parts 9, 10, 11, 12, and 13 which store bills. The storage parts 9, 10, and 11 are used mainly for storing bills handled at the time of receipt and payment of money. On the other hand, the storage parts 12 and 13 are used for storing bills to supplement lack of bills in the storage part 9, 10, or 11 and for storing received bills at the time of the storage parts 9, 10, and 11 being full.

A paper sheet stacking device according to the present invention can be applied to a part in which bills are stacked in a bundle. For example, a paper sheet stacking device according to the present invention is applied to a part which is placed adjacently to the bill insertion and dispensing aperture 2, which receives and stacks in order bills sent one by one from the storage part 9, 10, or 11 at the time of payment of money, and which passes the bills to the bill insertion and dispensing aperture 2 in a bundle. It is a matter of course that a paper sheet stacking device according to the present invention can also be applied to the temporary pool part 7, the reject part 8, and the storage parts 9, 10, 11, 12, and 13.

FIG. 3 is a side-view which illustrates the rough structure of a paper sheet stacking device according to a first embodiment. FIG. 4 is a perspective view which illustrates the rough structure of the paper sheet stacking device according to the first embodiment.

The paper sheet stacking device according to the first embodiment includes a paper sheet storage part 21 which stacks and stores bills 20 conveyed one by one. A roller 22 is placed on a side over the paper sheet storage part 21 on which the bills 20 are received and a roller 23 is placed on an opposite side over the paper sheet storage part 21 on which the bills 20 are released. An endless conveyer belt 24 is looped on the rollers 22 and 23 and bill holding members 25 which hold ends of the bills 20 conveyed are fixed onto an outer surface of the conveyer belt 24. In the examples of FIGS. 3 and 4, a plurality of bill holding members 25 are arranged at determined intervals in a conveyance direction on the outer surface of the conveyer belt 24 in a state in which they overlap with one another. However, the bill holding members 25 may be fixed onto the conveyer belt 24 in the conveyance direction in a state in which they do not overlap with one another, that is to say, in a state in which they are apart from one another. If the bill holding members 25 do not overlap with one another, then FIGS. 3 and 4 indicate the movement of the bill holding members 25 at the time of the conveyer belt 24 operating.

Furthermore, a pair of conveying rollers 26 and 27 is placed adjacently to the paper sheet stacking device on the side on which the bills 20 are received, and fulfills the function of passing to the paper sheet stacking device bills 20 conveyed longitudinally one by one. The bills 20 passed to the paper sheet stacking device are conveyed in a state in which their ends are held by the bill holding members 25 of the paper sheet stacking device. Accordingly, a conveying speed of the conveyer belt 24 is equal to or slightly lower than a speed at which the bills 20 are conveyed by the conveying rollers 26 and 27.

The ends of the bills 20 supplied by the conveying rollers 26 and 27 are held on the roller 22 side by the conveyer belt 24 and the bill holding members 25. The bills 20 are conveyed to the opposite side of the paper sheet storage part 21 in a state in which their ends are held by the conveyer belt 24 and the bill holding members 25. The bill holding members 25 release the bills 20 on the roller 23 side. As a result, the bills 20 fall onto a top bill stored in the paper sheet storage part 21 and are stacked.

If a large number of bills 20 are stored, the paper sheet storage part 21 has at the bottom a stage which freely goes up and down. Accordingly, when the number of bills 20 stored in the paper sheet storage part 21 changes, control is exercised so that the stage will go up or down. As a result, the position of a top bill 20 does not change materially.

Furthermore, in the example of FIG. 4, one conveyer belt 24 onto which the bill holding members 25 are fixed is placed in order to store the bills 20 conveyed in the paper sheet storage part 21. However, a plurality of conveyer belts 24 may be arranged and used at need.

FIGS. 5A and 5B are views for describing a relationship between the conveyer belt and a bill holding member of the paper sheet stacking device according to the first embodiment. FIG. 5A is a view for describing the shape of the bill holding member which is not yet attached to the conveyer belt. FIG. 5B is a view which illustrates a state of the bill holding member at operation time.

The bill holding member 25 has a base 25 a fixed onto the conveyer belt 24 and a bill pressing portion 25 b which extends from the base 25 a in a direction close to a direction of conveyance by the conveyer belt 24 and which presses a bill 20 against the conveyer belt 24. The base 25 a and the bill pressing portion 25 b are integrally formed from an elastic material.

As illustrated in FIG. 5A, the bill holding member 25 is formed so that it will have the following shape. A free end 25 c of the bill pressing portion 25 b cuts into the conveyer belt 24 by distance a beyond a fitting face 25 d of the base 25 a. As a result, as illustrated in FIG. 5B, if the bill holding member 25 is fixed onto the conveyer belt 24, the free end 25 c of the bill pressing portion 25 b functions so as to bend the conveyer belt 24 to a side opposite a side on which the bill holding member 25 is fixed. This flection is grip force for holding the bill 20.

FIGS. 6A and 6B are views from a paper sheet storage part side which illustrate a state in which bill holding members are attached to the conveyer belt. FIG. 6A is a view which illustrates an example of the shape of bill holding members. FIG. 6B is a view which illustrates another example of the shape of bill holding members.

The bill holding members 25 are arranged at determined intervals in the direction of conveyance by the conveyer belt 24 so that they will not overlap with one another. In FIG. 6A, the bill holding members 25 are arranged in a state in which a base 25 a of a bill holding member 25 and a free end 25 c of an adjacent bill holding member 25 are apart. In FIG. 6B, on the other hand, a notch is cut in a central portion on a base 25 a side of each bill holding member 25 and the bill holding members 25 are arranged in a state in which a free end 25 c of a bill holding member 25 fits into a notch of an adjacent bill holding member 25. By shortening in this way intervals at which the bill holding members 25 are arranged in the direction of conveyance by the conveyer belt 24, the number of positions on the conveyer belt 24 at which the bill holding members 25 receive bills 20 from the conveying rollers 26 and 27 increases. This means that cooperation control of the conveying rollers 26 and 27 and the rollers 22 and 23 becomes easier.

FIGS. 7A and 7B are views for describing another relationship between the conveyer belt and a bill holding member of the paper sheet stacking device according to the first embodiment. FIG. 7A is a view for describing the shape of the bill holding member which is not yet attached to the conveyer belt. FIG. 7B is a view which illustrates a state of the bill holding member at operation time.

Unlike the case of FIGS. 5A and 5B, the bill holding members 25 are arranged on the conveyer belt 24 in a state in which they overlap with one another. A bill holding member 25 has a base 25 a fixed onto the conveyer belt 24 and a bill pressing portion 25 b which extends from the base 25 a in the direction of conveyance by the conveyer belt 24 and which presses a bill 20 against the conveyer belt 24. In the example of FIG. 7A, the bill holding member 25 has a pressing protrusion 25 e near a free end 25 c of the bill pressing portion 25 b on a conveyer belt 24 side. The base 25 a, the bill pressing portion 25 b, and the pressing protrusion 25 e are integrally formed from an elastic material.

As illustrated in FIG. 7A, the bill holding member 25 is formed so that it will have the following shape. The pressing protrusion 25 e protrudes by distance b from a face on a paper sheet storage part 21 side of the bill pressing portion 25 b to the conveyer belt 24 side. As a result, if a bill holding member 25-1 and an adjacent bill holding member 25-2 behind are fixed onto the conveyer belt 24, a state illustrated in FIG. 7B arises. That is to say, a pressing protrusion 25 e-1 of the bill holding member 25-1 is on a bill pressing portion 25 b-2 of the adjacent bill holding member 25-2 behind and a bill pressing portion 25 b-1 bends to the paper sheet storage part 21 side. At this time the pressing protrusion 25 e-1 of the bill holding member 25-1 touches an area c on an outer surface of the bill pressing portion 25 b-2 of the adjacent bill holding member 25-2 behind by a reaction caused by the flection of the bill pressing portion 25 b-1. As a result, grip force for holding the bill 20 is obtained. In addition, an inner surface of the bill pressing portion 25 b-1 of the bill holding member 25-1 touches an end portion d of a base 25 a-2 of the adjacent bill holding member 25-2 behind. By doing so, the bill 20 is held. Therefore, the bill 20 is fixed more firmly.

FIG. 8 is a fragmentary sectional view which illustrates an example of the combination of the conveyer belt and the bill holding member.

A rib 24 a protruding from a surface of the conveyer belt 24 onto which the bill holding member 25 is fixed is formed. This rib 24 a has a head portion at its end and extends in a crosswise direction of the conveyer belt 24 so as to cross the conveyer belt 24. A section of the rib 24 a has the shape of a mushroom. A more detailed description of the rib 24 a is as follows. A base 24 b of the rib 24 a (at which the rib 24 a is joined to the conveyer belt 24) is narrow in the direction of conveyance by the conveyer belt 24 and an opposite end portion 24 c of the rib 24 a is wider in the direction of conveyance by the conveyer belt 24 than the base 24 b of the rib 24 a. On the other hand, a fitting groove 25 f whose section has the same shape that a section of the rib 24 a has is formed in the base 25 a of the bill holding member 25 so that it will extend in the crosswise direction of the conveyer belt 24.

The bill holding member 25 is fixed onto the conveyer belt 24 by fitting the rib 24 a of the conveyer belt 24 into the fitting groove 25 f and sliding the bill holding member 25 in the crosswise direction of the conveyer belt 24. A portion in which the rib 24 a is fitted into the fitting groove 25 f is fixed more firmly, for example, by injecting an adhesive into clearance. Furthermore, the size of the fitting groove 25 f is made approximately equal to or slightly smaller than that of the rib 24 a. By doing so, the bill holding member 25 is fixed firmly when the rib 24 a is fitted into the fitting groove 25 f. In addition, a part of bill holding members 25 which are significantly expendable can be replaced.

FIG. 9 is a view for describing a state in which bills are arranged on a bill release side by the bill holding members.

The paper sheet storage part 21 has, on a side on which bills 20 held and conveyed by the conveyer belt 24 and the bill holding members 25 are released, a guide 21 a for catching and properly arranging the released bills 20. A base 25 a of a bill holding member 25 reaches an area in which the direction of conveyance by the conveyer belt is changed by the roller 23, and a bill pressing portion 25 b of the bill holding member 25 gets apart from the conveyer belt 24. At this time a bill 20 is released. At this point of time the force of conveyance by the conveying rollers 26 and 27 has already been lost, so the released bill 20 falls at that position onto a stacked top bill 20 stored in the paper sheet storage part 21. After that, a bill holding member 25 on a downstream side in the direction of conveyance of the bill holding member 25 which has held and conveyed the bill 20 rises from the conveyer belt 24 and moves to the guide 21 a while pressing a portion near an end of the stored bill 20 with an outer surface 25 k of its bill pressing portion 25 b. As the bill pressing portion 25 b moves, the top bill 20 slides on a second stored bill 20 from the top. A front edge of the top bill 20 touches the guide 21 a and stops. As a result, bills 20 are stacked and stored in the paper sheet storage part 21 in an arranged state in which their front edges are touching the guide 21 a.

FIGS. 10A and 10B are views which illustrate bill holding members included in a paper sheet stacking device according to a second embodiment. FIG. 10A is a view which illustrates the bill holding members that are arranged on a conveyer belt so as not to overlap with one another. FIG. 10B is a view which illustrates the bill holding members that are arranged on the conveyer belt so as to overlap with one another. Components in FIGS. 10A and 10B which are identical or equivalent to those illustrated in FIGS. 5 and 7 are marked with the same numerals and detailed descriptions of them will be omitted.

A bill holding member 25 used in a paper sheet stacking device according to a second embodiment realizes grip force for holding a bill 20 by the elastic force of an elastic body. That is to say, the bill holding member 25 has a base 25 a whose one end is fixed onto a conveyer belt 24 and which is made from a hard material, a bill pressing portion 25 b attached to the other end of the base 25 a, and an elastic body which makes the bill pressing portion 25 b tilt to a conveyer belt 24 side. The bill pressing portion 25 b preferably is attached to the base 25 a so that the bill pressing portion 25 b can pivot. A coiled spring 25 g is placed on an axis and makes the bill pressing portion 25 b tilt to the conveyer belt 24 side.

A range in which the bill pressing portion 25 b tilts is limited so that when the bill holding member 25 receives a bill 20 from conveying rollers 26 and 27, interference will not occur between the conveying rollers 26 and 27 and the bill pressing portion 25 b. In the case of FIG. 10A in which the bill holding members 25 are arranged on the conveyer belt 24 so as not to overlap with one another, the bill pressing portion 25 b can tilt only to a position in the conveyer belt 24 indicated by a dashed line in a state in which the bill holding member 25 is not fixed onto the conveyer belt 24. This is realized, for example, by attaching a stopper portion by which a part of the bill pressing portion 25 b touches the base 25 a and by which the bill pressing portion 25 b cannot pivot any further. Furthermore, in the case of FIG. 10B in which the bill holding members 25 are arranged on the conveyer belt 24 so as to overlap with one another, the bill pressing portion 25 b can tilt only to a position in a base 25 a of an adjacent bill holding member 25 indicated by a dashed line.

FIGS. 11A and 11B are views which illustrate a modification of the bill holding member included in the paper sheet stacking device according to the second embodiment. FIG. 11A is a view which illustrates bill holding members that are arranged on the conveyer belt so as not to overlap with one another. FIG. 11B is a view which illustrates the bill holding members that are arranged on the conveyer belt so as to overlap with one another.

A bill holding member 25 used in the paper sheet stacking device according to the second embodiment realizes grip force for holding a bill 20 by the elastic force of a plate spring 25 h. That is to say, the bill holding member 25 has a base 25 a whose one end is fixed onto a conveyer belt 24 and which is made from a hard material, a bill pressing portion 25 b attached to the other end of the base 25 a, and the plate spring 25 h which is an elastic body and which makes the bill pressing portion 25 b tilt to a conveyer belt 24 side. The bill holding member 25 is formed by fixing both ends of the plate spring 25 h, which is resin or metal, to the base 25 a and the bill pressing portion 25 b. For example, the plate spring 25 h is an insert and the bill holding member 25 is formed by insert molding. In this case, resin is poured around the plate spring 25 h and is hardened. By doing so, the base 25 a and the bill pressing portion 25 b are formed.

In the case of FIG. 11A in which bill holding members 25 are arranged on the conveyer belt 24 so as not to overlap with one another, the grip force of the plate spring 25 h is used for holding a bill 20 by the bill pressing portion 25 b and the conveyer belt 24. Furthermore, in the case of FIG. 11B in which the bill holding members 25 are arranged on the conveyer belt 24 so as to overlap with one another, the grip force of the plate spring 25 h is used for holding a bill 20 by the bill pressing portion 25 b and a base 25 a of an adjacent bill holding member 25.

FIG. 12 is a view which illustrate a bill holding member included in a paper sheet stacking device according to a third embodiment.

A bill holding member 25 used in a paper sheet stacking device according to a third embodiment realizes grip force for holding a bill 20 by the magnetic attraction force between magnetic attraction portions. That is to say, the bill holding member 25 has a base 25 a fixed onto a conveyer belt 24, a bill pressing portion 25 b which extends from the base 25 a approximately parallel with the face of the conveyer belt 24 and which can swing with the base 25 a as a supporting point, and a magnet 25 i fixed to an end of the bill pressing portion 25 b. In addition, in order to give grip force to the bill holding member 25, a magnetic substance 25 j is placed on a side of the conveyer belt 24 opposite a side on which the bill holding member 25 is fixed. An end of the magnetic substance 25 j on a side on which a bill 20 is released extends to a position at which the bill 20 is released. As a result, when the magnet 25 i of the bill holding member 25 moves in an area in which the magnetic substance 25 j is placed, the magnet 25 i is attracted by the magnetic substance 25 j and grip force is produced. The bill 20 is held by this grip force. The bill 20 is released at a position at which the magnetic substance 25 j ends.

In the example of FIG. 13, the moving magnetic attraction portion placed in the bill holding member 25 is the magnet 25 i and the fixed magnetic attraction portion placed inside the conveyer belt 24 is the magnetic substance 25 j. However, the moving magnetic attraction portion and the fixed magnetic attraction portion may be a magnetic substance and a magnet, respectively, or both of the moving magnetic attraction portion and the fixed magnetic attraction portion may be magnets. If a magnet is placed inside the conveyer belt 24, the magnets are magnetized so that their faces opposite the conveyer belt 24 will have different magnetic polarities.

In the above embodiments many bill holding members 25 are arranged on the conveyer belt 24. However, if circumstances require, only one bill holding member 25 may be used. In this case, it is desirable to drive the rollers 22 and 23 in synchronization with the conveying rollers 26 and 27 or drive the conveying rollers 26 and 27 in synchronization with the rollers 22 and 23, according to a state in which a bill 20 is conveyed.

With the paper sheet stacking device having the above structure, an end of a paper sheet conveyed is held by grip force of the paper sheet holding member and is drawn in. The grip force is released on a side opposite the reception side. The paper sheet is made to fall onto stacked paper sheets. Therefore, the paper sheet stacking device has the advantage of being able to stably store a paper sheet.

In addition, with this paper sheet stacking device an end of a paper sheet is gripped and is drawn in. As a result, a paper sheet can be conveyed for a long distance, compared with a case where a paper sheet is pushed in by utilizing its rigidity. Therefore, this paper sheet stacking device is suitable for introducing and storing rectangular paper sheets longitudinally.

All examples and conditional language provided herein are intended for the pedagogical purposes of aiding the reader in understanding the invention and the concepts contributed by the inventor to further the art, and are not to be construed as limitations to such specifically recited examples and conditions, nor does the organization of such examples in the specification relate to a showing of the superiority and inferiority of the invention. Although one or more embodiments of the present invention have been described in detail, it should be understood that various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention. 

What is claimed is:
 1. A paper sheet stacking device which introduces paper sheets conveyed and which stores the paper sheets in a stacked state, the device comprising: a paper sheet storage part which receives and stores the paper sheets one by one; an endless conveyer belt looped on a first roller placed on a side over the paper sheet storage part on which the paper sheets are received and a second roller placed on a side over the paper sheet storage part on which the paper sheets are released; and paper sheet holding members each having one end fixed onto an outer surface of the conveyer belt and another end energized to a conveyer belt side on a upstream side in a conveyance direction of a position at which the one end is fixed.
 2. The paper sheet stacking device according to claim 1, wherein: the paper sheet holding members are arranged at determined intervals in the conveyance direction of the conveyer belt so as not to overlap with one another; and the paper sheet is held by the another end and the conveyer belt.
 3. The paper sheet stacking device according to claim 2, wherein: each of the paper sheet holding members is an elastic body having a shape by which the another end is, at the time of the one end being fixed onto the conveyer belt like a plane, at a position beyond the plane of the conveyer belt; and the elastic body is bent by the conveyer belt and therefore the paper sheet is held.
 4. The paper sheet stacking device according to claim 2, wherein: each of the paper sheet holding members has a first portion having one end which is fixed onto the conveyer belt and which is formed from a hard material, a second portion attached to a free end of the first portion, and an elastic body which energizes the second portion so as to make the second portion tilt to the conveyer belt side; and the second portion holds the paper sheet by energizing force of the elastic body.
 5. The paper sheet stacking device according to claim 4, wherein the elastic body is a coiled spring placed on an axis at which the second portion is attached to the first portion so as to freely pivot.
 6. The paper sheet stacking device according to claim 4, wherein the elastic body is a plate spring whose both ends are fixed to the first portion and the second portion.
 7. The paper sheet stacking device according to claim 2, wherein: each of the paper sheet holding members has a swinging portion which extends approximately parallel with a face of the conveyer belt and which can swing with the one end fixed onto the conveyer belt as a supporting point and a first magnetic attraction portion attached to a free end of the swinging portion; and the paper sheet is held by attraction force produced between the first magnetic attraction portion and a second magnetic attraction portion placed in a lower conveyance area inside the conveyer belt.
 8. The paper sheet stacking device according to claim 7, wherein one of the first magnetic attraction portion and the second magnetic attraction portion is a magnet and another is a magnet or a magnetic substance.
 9. The paper sheet stacking device according to claim 1, wherein: the paper sheet holding members are arranged at determined intervals in the conveyance direction of the conveyer belt so as to overlap with one another; and the paper sheet is held by the another end and an adjacent paper sheet holding member on an upstream side in the conveyance direction.
 10. The paper sheet stacking device according to claim 9, wherein: each of the paper sheet holding members is an elastic body having a shape by which the another end is, at the time of the one end being fixed onto the conveyer belt like a plane, at a position on the conveyer belt side beyond a face on the paper sheet storage part side of the adjacent paper sheet holding member on a upstream side in the conveyance direction; and the another end is on the adjacent paper sheet holding member, the elastic body bends, and therefore the paper sheet is held.
 11. The paper sheet stacking device according to claim 9, wherein: each of the paper sheet holding members has a first portion having one end which is fixed onto the conveyer belt and which is formed from a hard material, a second portion attached to a free end of the first portion, and an elastic body which energizes the second portion so as to make the second portion tilt to the conveyer belt side; and the second portion which is on the first portion of an adjacent paper sheet holding member on a upstream side in the conveyance direction holds the paper sheet by energizing force of the elastic body.
 12. The paper sheet stacking device according to claim 11, wherein the elastic body is a coiled spring placed on an axis at which the second portion is attached to the first portion so as to freely pivot.
 13. The paper sheet stacking device according to claim 11, wherein the elastic body is a plate spring whose both ends are fixed to the first portion and the second portion.
 14. The paper sheet stacking device according to claim 2, wherein each of the paper sheet holding members is fixed onto the conveyer belt by fitting a rib protruding from a face of the conveyer belt onto which each of the paper sheet holding members is fixed into a fitting groove which is formed on one end side of each of the paper sheet holding members and whose section is equal in shape to a section of the rib.
 15. The paper sheet stacking device according to claim 1, wherein: the paper sheet holding members are arranged at determined intervals in the conveyance direction of the conveyer belt; a notch is cut in the one end of each of the paper sheet holding members fixed onto the outer surface of the conveyer belt; and the paper sheet holding members are arranged in a state in which the another end of each adjacent paper sheet holding member on an downstream side in the conveyance direction fits into the notch. 